Added call to donate after npm install (optional)

package.json

@@ -17,7 +17,7 @@
     "lint": "eslint \"src/**/*.{js, json}\"",
     "transpile": "npm run compile && cp src/basic/Icon/NBIcons.json dist/src/basic/Icon",
     "prepublish": "npm run transpile",
-    "postinstall": "node addEjectScript.js",
+    "postinstall": "node addEjectScript.js && opencollective-postinstall",
     "flow": "flow"
   },
   "jest": {
@@ -37,15 +37,16 @@
     "jest-react-native": "^18.0.0",
     "lodash": "4.17.11",
     "native-base-shoutem-theme": "0.2.3",
+    "opencollective-postinstall": "^2.0.2",
     "print-message": "^2.1.0",
     "prop-types": "^15.5.10",
     "react-native-drawer": "2.5.1",
     "react-native-easy-grid": "0.2.1",
     "react-native-keyboard-aware-scroll-view": "0.8.0",
     "react-native-vector-icons": "6.1.0",
+    "react-timer-mixin": "^0.13.4",
     "react-tween-state": "^0.1.5",
-    "tween-functions": "^1.0.1",
-    "react-timer-mixin": "^0.13.4"
+    "tween-functions": "^1.0.1"
   },
   "devDependencies": {
     "babel-cli": "^6.18.0",
@@ -86,5 +87,9 @@
   "repository": {
     "type": "git",
     "url": "git+https://github.com/GeekyAnts/NativeBase.git"
+  },
+  "collective": {
+    "type": "opencollective",
+    "url": "https://opencollective.com/NativeBase"
   }
-}
+}